export interface Dog {
  age: number
  name: string
  color?: string //可选实现 但是实现就必须是string类型的
}

export interface CourseI {
  title: string
  lesson_num: number
  cat_id: number
  teacher: string
  brief: string
  cover_url: string
  discounts: number
  price: number
  sales: number
  discountsTag: string
  details: string
}

interface RootObject {
  id: number
  course_id: number
  title: string
  description: string
  sort: number
}

interface chapterResInfo {
  id?: number
  course_id: number
  chapterName: string
  description: string
  sort: number
  updatedAt?: string
  createdAt?: string
}
